Question 1

Is Online Ruler Pro accurate?

Accepted Answer

Yes. Online Ruler Pro uses screen calibration to display measurements in real-world size, making it accurate for measuring objects on your screen.

Question 2

How does screen calibration work?

Accepted Answer

You calibrate the ruler by matching it to a standard credit card or known-size object. This adjusts the ruler to your screen’s actual dimensions.

Question 3

Can I use this online ruler on mobile?

Accepted Answer

Yes. Online Ruler Pro works on mobile phones, tablets, and desktops, as long as you calibrate the screen correctly.

Question 4

Does this ruler measure in real size?

Accepted Answer

Yes. After calibration, the ruler displays measurements in real-world size for centimeters, millimeters, and inches.

Question 5

Is Online Ruler Pro free to use?

Accepted Answer

Yes. Online Ruler Pro is completely free and does not require any downloads or installations.